Evidence map›Paper›PMID 33379919›Full record

ArticleThe Journal of the Acoustical Society of America2020

How electrically evoked compound action potentials in chronically implanted guinea pigs relate to auditory nerve health and electrode impedance.

Kara C Schvartz-Leyzac, Deborah J Colesa, Christopher J Buswinka, Andrew M Rabah, Donald L Swiderski, Yehoash Raphael, Bryan E Pfingst

Abstract read
In one paragraph

Article in The Journal of the Acoustical Society of America, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

19 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. An Electrically Evoked Compound Action Potential Marker for Local Spiral Ganglion Neuron Degeneration: The Failure Index.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
    Article
  5. Article
  6. Article
  7. Article
  8. Cochlear Health and Cochlear-implant Function.Journal of the Association for Research in Otolaryngology : JARO · 2023
    Review
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Effects of Electrode Location on Estimates of Neural Health in Humans with Cochlear Implants.Journal of the Association for Research in Otolaryngology : JARO · 2020
    Article
  17. Article
  18. Article
  19. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Kara C Schvartz-LeyzacKresge Hearing Research Institute, Department of Otolaryngology, University of Michigan, 1150 West Medical Center Drive, Ann Arbor, Michigan 48109-5616, USA.ORCID s0000000281946513
Deborah J ColesaKresge Hearing Research Institute, Department of Otolaryngology, University of Michigan, 1150 West Medical Center Drive, Ann Arbor, Michigan 48109-5616, USA.
Christopher J BuswinkaKresge Hearing Research Institute, Department of Otolaryngology, University of Michigan, 1150 West Medical Center Drive, Ann Arbor, Michigan 48109-5616, USA.
Andrew M RabahKresge Hearing Research Institute, Department of Otolaryngology, University of Michigan, 1150 West Medical Center Drive, Ann Arbor, Michigan 48109-5616, USA.
Donald L SwiderskiKresge Hearing Research Institute, Department of Otolaryngology, University of Michigan, 1150 West Medical Center Drive, Ann Arbor, Michigan 48109-5616, USA.
Yehoash RaphaelKresge Hearing Research Institute, Department of Otolaryngology, University of Michigan, 1150 West Medical Center Drive, Ann Arbor, Michigan 48109-5616, USA.
Bryan E PfingstKresge Hearing Research Institute, Department of Otolaryngology, University of Michigan, 1150 West Medical Center Drive, Ann Arbor, Michigan 48109-5616, USA.

Funding

Scientific Synergy CoreP30DC005188 · NIDCD · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI SCHACHT, JOCHEN · 2002 to 2016
$10.3M
Functionally Important Features of the Electrically Stimulated CochleaR01DC015809 · NIDCD · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI PFINGST, BRYAN E · 2017 to 2021
$3.2M
Across-Site Patterns of Perception with Cochlear ImplantsR01DC010786 · NIDCD · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI PFINGST, BRYAN E · 2010 to 2014
$1.6M
NIDCD NIH HHS P30 DC005188NIDCD NIH HHS R01 DC010786NIDCD NIH HHS R01 DC015809
6 · The paper itself

Abstract

This study examined how multiple measures based on the electrically evoked compound action potential (ECAP) amplitude-growth functions (AGFs) were related to estimates of neural [spiral ganglion neuron (SGN) density and cell size] and electrode impedance measures in 34 specific pathogen free pigmented guinea pigs that were chronically implanted (4.9-15.4 months) with a cochlear implant electrode array. Two interphase gaps (IPGs) were used for the biphasic pulses and the effect of the IPG on each ECAP measure was measured ("IPG effect"). When using a stimulus with a constant IPG, SGN density was related to the across-subject variance in ECAP AGF linear slope, peak amplitude, and N1 latency. The SGN density values also help to explain a significant proportion of variance in the IPG effect for AGF linear slope and peak amplitude measures. Regression modeling revealed that SGN density was the primary dependent variable contributing to across-subject variance for ECAP measures; SGN cell size did not significantly improve the fitting of the model. Results showed that simple impedance measures were weakly related to most ECAP measures but did not typically improve the fit of the regression model.

Indexed as

Cochlear ImplantationCochlear ImplantsDeafnessAction PotentialsAnimalsCochlear NerveElectric ImpedanceElectric StimulationEvoked Potentials, AuditoryGuinea Pigs

Identifiers

PMID33379919
PMCPMC7863685

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.